A fraction collector for large-volume chromatograph separations

Electromembrane Processes, a Toolbox for Advanced Separations

electromembrane processes, a toolbox for advanced separations

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Large Deviations of the Empirical Volume Fraction for Stationary Poisson Grain Models

We study the existence of the (thermodynamic) limit of the scaled cumulant-generating function Ln(z) = |Wn| log E exp{z |Ξ ∩Wn|} of the empirical volume fraction |Ξ ∩Wn|/|Wn| , where | · | denotes the d-dimensional Lebesgue measure. Here, Ξ = ∪i≥1 (Ξi + Xi) denotes a d-dimensional Poisson grain model (also known as Boolean model) defined by a stationary Poisson process Πλ = ∑ i≥1 δXi with inten...

A Supercritical Fluid Chromatograph for Physicochemical Studies

A supercritical fluid chromatograph has been designed and constructed to make physicochemical measurements, while retaining the capability to perform chemical analysis. The physicochemical measurements include diffusion coefficients, capacity ratios, partition coefficients, partial molar volumes, virial coefficients, solubilities, and molecular weight distributions of polymers. In this paper, t...

Large-scale screening of zeolite structures for CO2 membrane separations.

We have conducted large-scale screening of zeolite materials for CO2/CH4 and CO2/N2 membrane separation applications using the free energy landscape of the guest molecules inside these porous materials. We show how advanced molecular simulations can be integrated with the design of a simple separation process to arrive at a metric to rank performance of over 87,000 different zeolite structures,...